Header menu link for other important links
Alanine assisted low-temperature synthesis and characterization of nanocrystalline SOFC cathodes
P. Pal, M.W. Raja, J. Mukhopadhyay, , S. Mahanty, R.N. Basu, H.S. Maiti
Published in
Volume: 7
Issue: 1 PART 1
Pages: 1129 - 1138
Nanocrystalline SOFC cathode materials of perovskite family, Lai. xSrxM1-yCoyO3, where 0<x≤0.5, 0<y≤0.8 (M is transitional metal= Mn or Fe) have been synthesized at a relatively low temperature by combustion technique using alanine as novel fuel. The thermal analyses of the precursor gels show sharp single step combustion with low decomposition temperature (170-200°C). Detailed X-ray powder diffraction analyses show 47-96% phase purity in the assynthesized powder and upon calcination at temperature ∼ 825°C, single phase material is obtained wherein the nanocrystallinity (crystallite size -19-24 nm) is retained. Densification studies of the materials are carried out within 900-1100°C The coefficient of thermal expansion (CTE) of the sintered cathodes is also measured. Detailed electrical characterizations of the sintered cathodes are evaluated and correlated with the microstrucmres. The electrochemical performances of SOFC single cells (Ni-YSZ anode-support /YSZ - 20 μm/LaFeO3-based cathodes) with ceria interlayer show high current density of ∼1.2 A/cm2 at 0.7 V at 800°C. © The Electrochemical Society.
About the journal
JournalECS Transactions